Joined
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261 Posts
Just wanted to put forth some information on anyone wanting to push the limits of the 4b11t:
First off here are my performance mods:
FP Black
Cobb Turbo inlet
AMS FMIC
UR U/L ICP
AEM Box CAI
Turbo back exhaust w/hi flow cat
ACT Street Disc Clutch/Flywheel (non 6-puck)
DW 1000cc Injectors on 91 AZ OCT
Cobb Fuel Pump Kit
Cobb Access Port with Pro-tune
Forge WGA
Perrin Pro 3 Port
NGR Type R BOV
I've been running my set up for about 2500 miles and so far, so good. I installed my turbo myself (which was about as fun as driving nails through your finger nails thanks to seized downpipe bolts) and had it tuned by PSI in Tucson which is an excellent shop full of very knowledgeable staff.
My tuner was aware of the limits of the stock block and I made it a point that I did not want to exceed 24-25psi and keep the torque very low. We tuned AFRs to stay at 11.5 tapering to 10.7-10-8 by redline.
My tune was a road tune so I do not have numbers to post. I am a big fan of the virtual dyno app and can only use that as comparison which is probably not that accurate but has let me see how I've gone power and torque wise from a 91 OCT stock turbo tune to an E85 stock turbo tune to now FP Black on 91 OCT.
I have dyno'd my stock turbo tunes in the past so I have a ball park analysis for power numbers. However, according to the virtual dyno I am around 400awhp and 340-350ft lbs of torque. The way I use the program parameters, this should be pretty damn accurate as I have compared these pulls to my real dyno's of my car in the past and if anything my numbers are actually lower.
Of note my clutch started going out almost immediately after running my car on this set up which was expected as I have well over 100 launches (generous guesstimate) and 23k on it (my car has 36k miles). I'm actually upgrading to a Competition 6 puck (I'll post later on that as there is not much info on Competition clutches in the X's).
Boost hit's in the mid 4k range and I would like to keep it that way as torque is what kills the stock block. The general consensus is to keep torque lower than 390 but I plan to keep it at the 350 range. We tuned this setup specifically in this manner with a little later spool to keep toque down. What does this mean? I will not mod anything else to gain power or toque until I build internals. No cams or exhaust manifold yet. We are at the limit of the stock engine.
While I do not want to blow my engine up, I live by the saying "you play, you pay." With that being said, I will update this post and let you guys know how everything goes and if I blow anything up.
First off here are my performance mods:
FP Black
Cobb Turbo inlet
AMS FMIC
UR U/L ICP
AEM Box CAI
Turbo back exhaust w/hi flow cat
ACT Street Disc Clutch/Flywheel (non 6-puck)
DW 1000cc Injectors on 91 AZ OCT
Cobb Fuel Pump Kit
Cobb Access Port with Pro-tune
Forge WGA
Perrin Pro 3 Port
NGR Type R BOV
I've been running my set up for about 2500 miles and so far, so good. I installed my turbo myself (which was about as fun as driving nails through your finger nails thanks to seized downpipe bolts) and had it tuned by PSI in Tucson which is an excellent shop full of very knowledgeable staff.
My tuner was aware of the limits of the stock block and I made it a point that I did not want to exceed 24-25psi and keep the torque very low. We tuned AFRs to stay at 11.5 tapering to 10.7-10-8 by redline.
My tune was a road tune so I do not have numbers to post. I am a big fan of the virtual dyno app and can only use that as comparison which is probably not that accurate but has let me see how I've gone power and torque wise from a 91 OCT stock turbo tune to an E85 stock turbo tune to now FP Black on 91 OCT.
I have dyno'd my stock turbo tunes in the past so I have a ball park analysis for power numbers. However, according to the virtual dyno I am around 400awhp and 340-350ft lbs of torque. The way I use the program parameters, this should be pretty damn accurate as I have compared these pulls to my real dyno's of my car in the past and if anything my numbers are actually lower.
Of note my clutch started going out almost immediately after running my car on this set up which was expected as I have well over 100 launches (generous guesstimate) and 23k on it (my car has 36k miles). I'm actually upgrading to a Competition 6 puck (I'll post later on that as there is not much info on Competition clutches in the X's).
Boost hit's in the mid 4k range and I would like to keep it that way as torque is what kills the stock block. The general consensus is to keep torque lower than 390 but I plan to keep it at the 350 range. We tuned this setup specifically in this manner with a little later spool to keep toque down. What does this mean? I will not mod anything else to gain power or toque until I build internals. No cams or exhaust manifold yet. We are at the limit of the stock engine.
While I do not want to blow my engine up, I live by the saying "you play, you pay." With that being said, I will update this post and let you guys know how everything goes and if I blow anything up.
